Estimating Life Expectancies of Highway Assets. Volume 2: Final Report
Author: Ford, Kevin M Arman, Mohammad H R Labi, Samuel Sinha, Kumares C Thompson, Paul D Shirole, Arun M Li, Zongzhi | Size: 19.99 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2012 | pages: 242 | ISBN: 9780309214087
This two-volume report provides a methodology for estimating the life expectancies of major types of highway system assets, in a form useful to state departments of transportation (DOTs) and others, for use in lifecycle cost analyses that support management decision making. Volume 1 is a guidebook for applying the methodology in DOT asset management policies and programs. Volume 2 describes the technical issues and data needs associated with estimating asset life expectancies and the practices used in a number of fields—such as the energy and financial industries—to make such estimates.
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This report is an update to NCHRP Report 365, "Travel Estimation Techniques for Urban Planning" and provides guidelines on travel demand forecasting procedures and their application for solving common transportation problems. The report presents a range of approaches that allow users to determine the level of detail and sophistication in selecting modeling and analysis techniques most appropriate to their situations and addresses straight-forward techniques, optional use of default parameters, and appropriate references to other more sophisticated techniques.
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Author: Keaton, Jeffrey R Mishra, Su K Clopper, Paul E | Size: 24.76 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2012 | pages: 184 | ISBN: 9780309214117
This report provides a methodology for estimating the time rate of scour and the design scour depth for a bridge founded on rock, as well as design and construction guidelines for application of the methodology. It will be of interest to hydraulic, bridge, and geotechnical engineers responsible for designing bridge foundations on rock or maintenance engineers concerned about existing bridges founded on erodible rock.
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Fatigue Loading and Design Methodology for High-Mast Lighting Towers
Author: Robert J. Connor Steven H. Collicott Allen M. DeSchepper Ryan J. Sherman Jaime A. Ocampo Purdue University West Lafayette, IN | Size: 10.58 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2012 | pages: 140 | ISBN: 9780309214032
This report provides criteria for the fatigue design of high-mast lighting towers (HMLTs). The report also includes a series of proposed revisions with associated commentary to the fatigue design provisions of the "AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals." In addition, to ensure the fatigue design provisions are properly implemented into practice, design examples are also provided. The material in this report will be of immediate interest to highway design engineers.
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Calibration of Rutting Models for Structural and Mix Design
Author: Von Quintus, Harold L Mallela, Jagannath Bonaquist, Ramon Schwartz, Charles W Carvalho, Regis L | Size: 29.55 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2012 | pages: 207 | ISBN: 978-0-309-21406-3
This report proposes revisions to the "Mechanistic-Empirical Pavement Design Guide" (MEPDG) and software to (1) incorporate three alternative rut-depth prediction models that rely on repeated load (triaxial) permanent deformation or constant height testing to provide the requisite input data, and (2) provide revised coefficients for the original and alternative rut-depth transfer functions or prediction models derived from material properties measured in the laboratory and pavement performance data. Thus, the report will be of immediate interest to engineers in public- and private-sector organizations with responsibility for the structural design and analysis of asphalt concrete pavements.
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TRB’s National Cooperative Highway Research Program (NCHRP) Report 720: Estimating the Effects of Pavement Condition on Vehicle Operating Costs presents models for estimating the effects of pavement condition on vehicle operating costs.
The models address fuel consumption, tire wear, and repair and maintenance costs and are presented as computational software that is included in the print version of the report in a CD-ROM format. The CD-ROM is also available for download from TRB’s website as an ISO image. Links to the ISO image and instructions for burning a CD-ROM from an ISO image are provided below.
Appendixes A through D to the report provide further elaboration on the work performed in the project that developed NCHRP Report 720. The appendixes, which were not included with the print version of the report, are only available for download through the link below.
• Appendix A: Fuel Consumption Models,
• Appendix B: Tire Wear Models,
• Appendix C: Repair and Maintenance Models, and
• Appendix D: An Overview of Emerging Technologies.
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Author: Mark D. Bowman | Size: 7.22 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2012 | pages: 115 | ISBN: 978-0-309-25826-5
TRB’s National Cooperative Highway Research Program (NCHRP) Report 721: Fatigue Evaluation of Steel Bridges provides proposed revisions to Section 7—Fatigue Evaluation of Steel Bridges of the American Association of State Highway and Transportation Officials Manual for Bridge Evaluation with detailed examples of the application of the proposed revisions.
Appendixes A-D to NCHRP Report 721 are only available electronically. The appendices, which are in one electronic document, are as follows:
• Appendix A - Survey Interview Forms
• Appendix B - AASHTO Fatigue Truck Validation Analysis Results
• Appendix C - Tack Weld Tests
• Appendix D - Distortion Induced Fatigue Tests
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Posted by: mahyarov - 10-23-2012, 06:09 AM - Forum: Concrete
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Application of LADAR in the Analysis of Aggregate Characteristics
Author: Linbing Wang Wenjuan Sun Evan M. Lally Anbo Wang | Size: 10.32 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2012 | pages: 86 | ISBN: 978-0-309-25845-6
TRB’s National Cooperative Highway Research Program (NCHRP) Report 724: Application of LADAR in the Analysis of Aggregate Characteristics describes a laser detection and ranging (LADAR)-based system for measurement of aggregate characteristics over a wide range of particle size.
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Guidelines for Analysis Methods and Construction Engineering of Curved and Skewed Steel Girder Bridges
Author: Donald W. White | Size: 19.06 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2012 | pages: 185 | ISBN: 978-0-309-25839-5
TRB’s National Cooperative Highway Research Program (NCHRP) Report 725: Guidelines for Analysis Methods and Construction Engineering of Curved and Skewed Steel Girder Bridges offers guidance on the appropriate level of analysis needed to determine the constructability and constructed geometry of curved and skewed steel girder bridges.
When appropriate in lieu of a 3D analysis, the guidelines also introduce improvements to 1D and 2D analyses that require little additional computational costs.
Appendixes C to K for NCHRP Report 725 are availble only in electronic format. A listing of those Appendixes and links to them are below:
• APPENDIX C—Evaluation of Analytical Methods for Construction Engineering of Curved and Skewed Steel Girder Bridges
• APPENDIX D—Benchmark Problems
• APPENDIX E—Executive Summaries of Study Bridges
• APPENDIX F—Early Correspondence with Owners and Agencies
• APPENDIX G—Owner/Agency Policies and Procedures
• APPENDIX H—Design Criteria for New Bridge Designs
• APPENDIX I—Extended Summaries of Study Bridges
• APPENDIX J—Bridge Drawings
• APPENDIX K—Organization of Electronic Data
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A Guidebook for Nighttime Construction: Impacts on Safety, Quality, and Productivity
Author: Jennifer S. Shane Iowa State Universi ty/Institute for Transportation Ames, IA | Size: 5.32 MB | Format:PDF | Quality:Original preprint | Publisher: Transportation Research Board | Year: 2012 | pages: 122 | ISBN: 978-0-309-25847-0
TRB’s National Cooperative Highway Research Program (NCHRP) Report 726: A Guidebook for Nighttime Construction: Impacts on Safety, Quality, and Productivity provides suggested guidance on the conduct of nighttime highway construction and maintenance operations.
These guidelines are based on best practices and strategies for nighttime operations that relate to the safety of workers and the traveling public as well as the quality of the as-built facility. The guide also addresses work-zone risk analysis planning and implementation, construction nuisances to both neighbors and workers, and work-zone illumination methods.
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